Pakpahan, Jarina. “Implementation of Suction Technique for Airway Cleaning Is Not Effective in Stroke Patients at Vita Insani Pematangsiantar Hospital”. COVID-19 : Journal of Health, Medical Records and Pharmacy, vol. 2, no. 01, Oct. 2024, pp. 47-53, https://jurnal.devitara.or.id/index.php/sehat/article/view/121.